Change-gearing.



E. G. JOHANSON.

CHANGE SHARING.

APPLwATIoN HLED 001.30, 1013.

1,128,684. Patented Feb. 16, 1915.

Gigi

' i" it subject ofthe King of Sweden, residing at4 UNITED' STATES,PATENT vonirica.

EMIL G. JOHANSON, OF.CHICAGO, ILLINOIS, ASSIGNOR T0 `SVEN ALBIN MLIN, OF

CHICAGO, ILLINOIS.

CHAN GE-GEARIN G.

Specicatlonof Letters Paten-t.

Patented Feb. 16, 1915 Application @led ctober 30, 1913. Serial No.798,193.

-To all 'whom 'it may concern:

Be it known that I, -EMIL G. JoHANsoN, a

Chicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in ChangeGearing, of which thefollowing is a specification- My invention relates to speed changingmechanisms and has particular reference to simple and compact mechanismadapted for automobiles andthe like where speed changes `are frequentlymade, where it is` desirable to take up a minimum of space, inclose thegears and avoid sudden jarrings .incidental to throwing gears into andout of mesh -With each other. A

In thepresent invention the gears are always in mesh for the differentspeeds, those not acting rotating idly, and all incased in a casing partof which is utihzed as a driving p art for the gears; and the inventionconsists in the novel construction, combination and arrangement of partsall as hereinafter described in detail, illustrated in the accompanyingdrawing and more particularly pointed out in the appended claim.

In the drawing-Figure v1 is an edge view showing the outside of a casingand change gear mechanism embodying my invention. Fig. 2 is a sectiontaken substantially on line 2-2 of Fig. 3. Fig. 3 is a section takensubstantially on line 3 3 of Fig. 2. Each of Figs. 4 to 8,inclusive,represents one ofthe different sets of gears shown in Fig. 3.vFig. i) is an enlarged perspective view of av broken away portion ofgears showing the relative toothed arrangement whereby the vdifferentspeeds are obtained.

In the several views 2 represents a drumshaped orcylindrical casing oneside Wall 3 of which is rotatably mountedv at-its edges ing ,may-betermed the motor element on s which is a wrist pin 9 which may be conynected with the piston of the usual engine (not shown).

From the inner ace'of the motor element, or disk 3 projects a spindle orstud-shaft l0 on which is rotatably Yextension from the extension' 15.

lmounted'a pinion or gearwheel 11 which meshes with a plurality of gearsthat are revolubly mounted on the Ashaft 7 and 1abeled 12, 13 ahd'14.The pinion 11 isalso in mesh'with a fixed gear Wheel 15 which projects`from the inner face of a wall 16 of the casing and may be an integralpart of said wall. The toothed Wheel 11 is therefore substantially fourpinions secured together and the portion of said wheel or pinion meshingwith the. fixed gea-r 15 is distinguished from its remaining portion bythe numeral 17. Between thisportion and the vportion labeled 11 isloosely mounted on a hub prtion 19 of the pinion 11i-(17, a pinion orgear Wheel 18 whichV is lthick enough to mesh with a fixed gearwheel 20,(which may also be an integral part of the wall 16 and wheel 15,) and agear wheel 21. The Wheel 20, like the wheel 15, is fixed relative to thewall 16, ora toothed annular Then the disk or casing Wall 3 is rotatedthe pinion 11 will be rotated by'reason of the mesh of its portion 17with-the toothed poras shown in Fig.' 3, is larger in circumference'thanthe pinion 11, or its portion 17,

while thestationary ring of teeth 20 is smaller inl circumference thanthe' stationary ring A'of teeth 15. The pinion 18 will therefore berotated at a slower rate of speed than the pinions 11 and 17. If theloose gears 12, 13 and 14 had the same num-V ber of teeth, respectively,as the pinion 11` they would, of course remain stationary while thepinion 11 rotated about the ring of teeth 15. The same would be true ofthe loose gear wheel 21 in its relation with the pinion 18 and ringof'teeth 20.

Motion is imparted 'to the wheels 12, 13,

14, and 21 by providing the first three with larger numbers of teeththan contained on the ring of teeth 15 and providing the wheel 21 withmore teeth than the number provided for the wheel 20. The wheels 15 and2 0 may be termed fulcrum wheels and the pinions 11|-17 tand 18 drivingor master wheels or`pinions. In the illustration the fulcrum wheel 15 isprovided with 30v teeth while the Wheel 13 has 31 teeth. The latterwheel will therefore be moved the distance of one tooth at each completerotation of the pinion 11, or 17, about the wheel 15'. The' wheel 12vis' provided with 32 teeth, which y makes its' speed of rotation doublethat'of the'wheel 13. The wheel 14 is provided with 33teeth, making itsspeed three times that of the wheel 13. The fulcrum-wheel carries 2 '0teeth while the wheel 21 has 21 teeth',l which gives the slowest of thefourspeeds' shown in Figs. 3 to 8, inclusive, by reason of the fact thatthe driving or master pinion 18 is larger and rotates slower than thepinion 11, andthe circumference of and number of teeth on the Wheel 2Ois smaller than that of the wheel 15.` In the arrangements shown toeither of these wheels consists of the folI lowing parts: Each ofl thewheels 12,13, 14 and 21 is providedwith preferably four key-seats 39tobe engaged by a series of vfour keys 40,41, 42 and 43 which arelateral projections on arms 44, pivoted on lugs 45 projecting from theinner face of a' head 46 slidably mounted in a bore 47 in the hub ofsprocket wheel 8. The arms'44 are placed in slots 48 formed in theperiphery of the 30 l shaft'7. The head146 is more firmly supported by aspindle 49 which projects rigidly from the head and Y.islongitudinallyslidable in a bore 50 through the axis of the.

shaft 7. y The latter is proifided with a flange 51 between which andthe. wheel 14 is interposed a Washer 51. To the flanged end of theshaft, which is flush with the outer surface of the disk or wall 3, issecured a' washer 52 which is larger than the opening for the shaftthrough said disk or wall.

The washer 52 is 'fastened byA a screw 53l which has threaded engagementwith a screw hole in the end of the shaft as shown in Fig. 3. The arms44 are tensioned to spread apart and force the keys into their4 seats,by means of springs 54 which are each secured to its arm 44 at one endand bear Yalzarmi with the other end a ain'st' the spindle '49.

The hub of the sproc et wheel 8 1s secured to the shaft 7 by means of a.set screwJ 55 or by any other suitable means. Looking at Fig. 3 theshaft 7 and its parts are assembled by inserting the shaft from belowthrough the shaft-'openings in the loose gear .wheels and casing untilthe flange 50 4contacts with the washer 51. The sprocket wheel is thenkeyed to the shaft. Finally the spindle 49 is inserted from the upperend'of the shaft, together with the arms 44. In Fig. 3 the keys 40 to 43are shown engagement with the wheel 21, the lowest speed. The mechanismfor moving the keys from that position into engagement with Y either ofthe other wheelsl land holding th"` keys in the adjusted positionconsists of lever 56 pivoted at5; to a lug 58f-on the casing'2, and at59 toa lug 60 on the head 46. This lever is provided with a movabledetent56 that may be engaged with 'either of four notches 61, `62, 63v01264 in a bar65 extending rigidly from the casing.

Having thusA described my invention, =Ix

claim as new and desire to secure by Letters Patent- Y The combinationwith a drumsshaped casing, one end or plane-side of which is revoluble,`of a shaft mounted vin said casing and serving as the axis of rotationfor said end or plane-side, a set of change gears of equal diameterscarried by said side, means to control the rotation of said gears, meanstoconnect said gears tothe shaft,`and means for changing the connectionsof said gears and varyingl the speedl of rotation 'of said shaft, saidmeans being operable through the end of s'aid shaft.

In testimony whereof I have hereunto set.

my hand in the presence of two subscribing witnesses.

EMIL G. JoHANsoN.

W itnesses JNO. il. NnLsoN, EDWIN B. NELSON.

